def calcul(base,n):
    tab=[]
    tab.append(base)
    tab.append(100-base)
    print tab
    for i in range(1,n):
        tab[0]= tab[0]- (tab[0]*3/100)
        tab[0] = tab[0] + (tab[1]*3.5/100)
        tab[1] = 100-tab[0]
    print tab
